<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>条件渲染</title>
</head>
<body>
<div id="div">
    <!-- 判断num的值，对3取余  余数为0显示div1  余数为1显示div2  余数为2显示div3 -->
    <div v-if="num % 3 == 0">div1</div>
    <div v-else-if="num % 3 == 1">div2</div>
    <div v-else="num % 3 == 2">div3</div>

    <div v-show="flag">div4</div>
</div>
</body>
<script src="js/vuejs-2.5.16.js"></script>
<script>
    new Vue({
        el:"#div",
        data:{
            num:3,
            flag:false
        }
    });
</script>
</html>